Question

the diameter of the wheel of a car is 56cm how many revolution will it take to cover 7.7km​

Answer 1

Diameter = 56 cm

Radius = 56 / 2

= 28 cm

Circumference = 2 × pi × r

$= 2 \times \frac{22}{7} \times 28$

= 176 cm

7.7 km = 770000 cm

no. of revolutions = 770000 / 176

= 4375 revolutions

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